Granted Patent
Utility
US 6,404,431 · App. 09/059,123
Virtual map store/cartographic processor
Inventor:
Randolph Gregory Farmer
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Apr 13, 1998
Inventor
Randolph Gregory Farmer
Assignee (at issue)
NORTHROP GRUMMAN CORPORATION
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.